Flue-attaching device.



P. I. GOLBERG.

FLUE ATTAGHING DEVIGE.

APPLIGATION FILED AUG. 22, 1910.

1,125,06 1911111111111 Jan. 19, 1915.

WITNESSES W 1% NTciR THE NORRIS PETERS CO1, PHOTO-LITHQ. WASHINGTON, D C

FRANK J. COLBERG, 0F CAPE GIRARDEAU, MISSOURI.

FLUE-ATTACHING DEVICE.

menace.

Specification of Letters Patent.

Application filed August 22, 1910. Serial No. 578,368.

To all whom it may concern:

Be it known that I, FRANK J. CoLBERG, a citizen of the United States of America, and resident of Cape Girardeau, in the county of Cape Girardeau and State of Missouri, have invented certain new and useful Improvements in Flue-Attaching Devices, of which the following is a specification.

This invention relates to boilers and particularly to flue attaching devices.

An object of this invention is to provide a flue and flue attaching device which permits the ready removal of the flue for the purpose of repairing the same and which also permits the application of the flue to the flue sheets so that the joints are practically unaffected by the expansion and contraction of the metals.

A still further object of this invention is to obviate the cost of threading the flues, the said flues having their ends spun into engagement with the flue containing member and novel means being provided for retaining the flue in operative relation to the flue retaining member.

With the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views, in which Figure 1 illustrates a sectional view of a fragment of a flue sheet and the flue retaining member applied thereto; Fig. 2 illustrates a perspective view of an end of the flue and flue retaining member to which it is applied; Fig. 3 illustrates a perspective view of the nut interlocking with the flue and flue engaging member.

In these drawings 5 denotes a fragment of a flue sheet having a series of apertures 6 therein, the walls of which are threaded for the reception 'of the exteriorly threaded rings 7 which rings 7 have the flange 8 with an octagonal surface which is designed to be engaged by a wrench or the like. As shown in the drawings, the member 7 is threaded on each side of the flange and the outer end of said member 7 is provided with a slight annular recess. The flue 9 has its end extending through the flue engaging ber and effecting a joint which will withstand the expansion and contraction of the metal and the usual wear incident to the use of such adevice.

By reason of the construction and arrangement of parts just described, it is possible to manufacture a boiler, the lines of Patented Jan. 19, 1915.

which may be readily removed for the purpose of replacing worn or broken parts and it is also possible to tighten the joints and otherwise maintain the high standard of efliciency in a boiler equipped with flues or tubes and attaching means embodying this invention; furthermore, each tube is independently attached or secured in place and therefore any one tube may be repaired without disturbing any of the other tubes and repairing can be done from the outside or from the fire box without dismantling the boiler.

I claim- The combination with a boiler head, a flue attaching device comprising an exteriorly threaded ring having a flange intermediate its length, one end of the threaded portion adapted to be positioned in an opening in the boiler head with one side of the flange engaging the boiler head and the outer end of said threaded ring having a recess, a flue having its end projecting through the flue attaching device and provided with a flanged end bearing against the end of the flue attaching device, and a ring nut having an opening substantially the size of the opening of the flue and having a flange adapted to bear against theflanged end of the flue, said nut being threaded on the outer end of the flue attaching device for clamping the flanged end of the flue into the recess of the flue attaching device.

In testimony whereof, I have afliXed my signature in the presence of two witnesses.

FRANK J. COLBERG. Witnesses:

WILL F. CoLBnRe, GRACE M. BOOKWALTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

